Free NBDE Part II Oral Radiology Question Bank

Question 11: What is considered as safe distance for operator while taking radiograph in dental setup?

A. 6 feet

B. 6 meters

C. 2 meters

D. 2 feet

Answer & Explanation

Answer: [A]


Question 12: At what KVp maximum image contrast is observed while taking IOPA?

A. 65

B. 75

C. 80

D. 90

Answer & Explanation

Answer: [A]


Question 13: What is the main purpose of using GRID while taking IOPA?

A. Removes the scattered radiation

B. Filter the radiation

C. Removes the secondary radiation

D. Increases the density of Xrays

Answer & Explanation

Answer: [A]


Question 14: Which of the following method can be used to increase the sharpness of the image on radiographic film?

A. Decrease the target skin distance

B. Increasing the size of focal spot

C. Decreasing the size of focal spot

D. Increasing the film to object distance

Answer & Explanation

Answer: [C]


Question 15: Which of the following radiographic techniques results in least patient radiation exposure?


B.CT scan


D. Water’s view

Answer & Explanation

Answer: [C]

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